15 files changed, 398 insertions, 144 deletions

diff --git a/sound/usb/6fire/control.c b/sound/usb/6fire/control.c
index 24846351118..ac828eff1a6 100644
--- a/sound/usb/6fire/control.c
+++ b/sound/usb/6fire/control.c
@@ -65,6 +65,15 @@ init_data[] = {
 	{ 0 } /* TERMINATING ENTRY */
 };
 
+static const int rates_altsetting[] = { 1, 1, 2, 2, 3, 3 };
+/* values to write to soundcard register for all samplerates */
+static const u16 rates_6fire_vl[] = {0x00, 0x01, 0x00, 0x01, 0x00, 0x01};
+static const u16 rates_6fire_vh[] = {0x11, 0x11, 0x10, 0x10, 0x00, 0x00};
+
+enum {
+	DIGITAL_THRU_ONLY_SAMPLERATE = 3
+};
+
 static void usb6fire_control_master_vol_update(struct control_runtime *rt)
 {
 	struct comm_runtime *comm_rt = rt->chip->comm;
@@ -95,6 +104,67 @@ static void usb6fire_control_opt_coax_update(struct control_runtime *rt)
 	}
 }
 
+static int usb6fire_control_set_rate(struct control_runtime *rt, int rate)
+{
+	int ret;
+	struct usb_device *device = rt->chip->dev;
+	struct comm_runtime *comm_rt = rt->chip->comm;
+
+	if (rate < 0 || rate >= CONTROL_N_RATES)
+		return -EINVAL;
+
+	ret = usb_set_interface(device, 1, rates_altsetting[rate]);
+	if (ret < 0)
+		return ret;
+
+	/* set soundcard clock */
+	ret = comm_rt->write16(comm_rt, 0x02, 0x01, rates_6fire_vl[rate],
+			rates_6fire_vh[rate]);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int usb6fire_control_set_channels(
+	struct control_runtime *rt, int n_analog_out,
+	int n_analog_in, bool spdif_out, bool spdif_in)
+{
+	int ret;
+	struct comm_runtime *comm_rt = rt->chip->comm;
+
+	/* enable analog inputs and outputs
+	 * (one bit per stereo-channel) */
+	ret = comm_rt->write16(comm_rt, 0x02, 0x02,
+			(1 << (n_analog_out / 2)) - 1,
+			(1 << (n_analog_in / 2)) - 1);
+	if (ret < 0)
+		return ret;
+
+	/* disable digital inputs and outputs */
+	/* TODO: use spdif_x to enable/disable digital channels */
+	ret = comm_rt->write16(comm_rt, 0x02, 0x03, 0x00, 0x00);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int usb6fire_control_streaming_update(struct control_runtime *rt)
+{
+	struct comm_runtime *comm_rt = rt->chip->comm;
+
+	if (comm_rt) {
+		if (!rt->usb_streaming && rt->digital_thru_switch)
+			usb6fire_control_set_rate(rt,
+				DIGITAL_THRU_ONLY_SAMPLERATE);
+		return comm_rt->write16(comm_rt, 0x02, 0x00, 0x00,
+			(rt->usb_streaming ? 0x01 : 0x00) |
+			(rt->digital_thru_switch ? 0x08 : 0x00));
+	}
+	return -EINVAL;
+}
+
 static int usb6fire_control_master_vol_info(struct snd_kcontrol *kcontrol,
 		struct snd_ctl_elem_info *uinfo)
 {
@@ -195,6 +265,28 @@ static int usb6fire_control_opt_coax_get(struct snd_kcontrol *kcontrol,
 	return 0;
 }
 
+static int usb6fire_control_digital_thru_put(struct snd_kcontrol *kcontrol,
+		struct snd_ctl_elem_value *ucontrol)
+{
+	struct control_runtime *rt = snd_kcontrol_chip(kcontrol);
+	int changed = 0;
+
+	if (rt->digital_thru_switch != ucontrol->value.integer.value[0]) {
+		rt->digital_thru_switch = ucontrol->value.integer.value[0];
+		usb6fire_control_streaming_update(rt);
+		changed = 1;
+	}
+	return changed;
+}
+
+static int usb6fire_control_digital_thru_get(struct snd_kcontrol *kcontrol,
+		struct snd_ctl_elem_value *ucontrol)
+{
+	struct control_runtime *rt = snd_kcontrol_chip(kcontrol);
+	ucontrol->value.integer.value[0] = rt->digital_thru_switch;
+	return 0;
+}
+
 static struct __devinitdata snd_kcontrol_new elements[] = {
 	{
 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
@@ -223,6 +315,15 @@ static struct __devinitdata snd_kcontrol_new elements[] = {
 		.get = usb6fire_control_opt_coax_get,
 		.put = usb6fire_control_opt_coax_put
 	},
+	{
+		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+		.name = "Digital Thru Playback Route",
+		.index = 0,
+		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
+		.info = snd_ctl_boolean_mono_info,
+		.get = usb6fire_control_digital_thru_get,
+		.put = usb6fire_control_digital_thru_put
+	},
 	{}
 };
 
@@ -238,6 +339,9 @@ int __devinit usb6fire_control_init(struct sfire_chip *chip)
 		return -ENOMEM;
 
 	rt->chip = chip;
+	rt->update_streaming = usb6fire_control_streaming_update;
+	rt->set_rate = usb6fire_control_set_rate;
+	rt->set_channels = usb6fire_control_set_channels;
 
 	i = 0;
 	while (init_data[i].type) {
@@ -249,6 +353,7 @@ int __devinit usb6fire_control_init(struct sfire_chip *chip)
 	usb6fire_control_opt_coax_update(rt);
 	usb6fire_control_line_phono_update(rt);
 	usb6fire_control_master_vol_update(rt);
+	usb6fire_control_streaming_update(rt);
 
 	i = 0;
 	while (elements[i].name) {
diff --git a/sound/usb/6fire/control.h b/sound/usb/6fire/control.h
index b534c777ab0..8f5aeead2e3 100644
--- a/sound/usb/6fire/control.h
+++ b/sound/usb/6fire/control.h
@@ -21,12 +21,29 @@ enum {
 	CONTROL_MAX_ELEMENTS = 32
 };
 
+enum {
+	CONTROL_RATE_44KHZ,
+	CONTROL_RATE_48KHZ,
+	CONTROL_RATE_88KHZ,
+	CONTROL_RATE_96KHZ,
+	CONTROL_RATE_176KHZ,
+	CONTROL_RATE_192KHZ,
+	CONTROL_N_RATES
+};
+
 struct control_runtime {
+	int (*update_streaming)(struct control_runtime *rt);
+	int (*set_rate)(struct control_runtime *rt, int rate);
+	int (*set_channels)(struct control_runtime *rt, int n_analog_out,
+		int n_analog_in, bool spdif_out, bool spdif_in);
+
 	struct sfire_chip *chip;
 
 	struct snd_kcontrol *element[CONTROL_MAX_ELEMENTS];
 	bool opt_coax_switch;
 	bool line_phono_switch;
+	bool digital_thru_switch;
+	bool usb_streaming;
 	u8 master_vol;
 };
 
diff --git a/sound/usb/6fire/firmware.c b/sound/usb/6fire/firmware.c
index 86c1a310376..d47beffedb0 100644
--- a/sound/usb/6fire/firmware.c
+++ b/sound/usb/6fire/firmware.c
@@ -3,12 +3,6 @@
  *
  * Firmware loader
  *
- * Currently not working for all devices. To be able to use the device
- * in linux, it is also possible to let the windows driver upload the firmware.
- * For that, start the computer in windows and reboot.
- * As long as the device is connected to the power supply, no firmware reload
- * needs to be performed.
- *
  * Author:	Torsten Schenk <torsten.schenk@zoho.com>
  * Created:	Jan 01, 2011
  * Version:	0.3.0
@@ -21,6 +15,7 @@
  */
 
 #include <linux/firmware.h>
+#include <linux/bitrev.h>
 
 #include "firmware.h"
 #include "chip.h"
@@ -33,32 +28,6 @@ enum {
 	FPGA_BUFSIZE = 512, FPGA_EP = 2
 };
 
-static const u8 BIT_REVERSE_TABLE[256] = {
-	0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0, 0x10, 0x90, 0x50,
-	0xd0, 0x30, 0xb0, 0x70, 0xf0, 0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8,
-	0x68, 0xe8, 0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8, 0x04,
-	0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4, 0x14, 0x94, 0x54, 0xd4,
-	0x34, 0xb4, 0x74, 0xf4, 0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c,
-	0xec, 0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc, 0x02, 0x82,
-	0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2, 0x12, 0x92, 0x52, 0xd2, 0x32,
-	0xb2, 0x72, 0xf2, 0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea,
-	0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa, 0x06, 0x86, 0x46,
-	0xc6, 0x26, 0xa6, 0x66, 0xe6, 0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6,
-	0x76, 0xf6, 0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee, 0x1e,
-	0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe, 0x01, 0x81, 0x41, 0xc1,
-	0x21, 0xa1, 0x61, 0xe1, 0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71,
-	0xf1, 0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9, 0x19, 0x99,
-	0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9, 0x05, 0x85, 0x45, 0xc5, 0x25,
-	0xa5, 0x65, 0xe5, 0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
-	0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed, 0x1d, 0x9d, 0x5d,
-	0xdd, 0x3d, 0xbd, 0x7d, 0xfd, 0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3,
-	0x63, 0xe3, 0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3, 0x0b,
-	0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb, 0x1b, 0x9b, 0x5b, 0xdb,
-	0x3b, 0xbb, 0x7b, 0xfb, 0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67,
-	0xe7, 0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7, 0x0f, 0x8f,
-	0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef, 0x1f, 0x9f, 0x5f, 0xdf, 0x3f,
-	0xbf, 0x7f, 0xff };
-
 /*
  * wMaxPacketSize of pcm endpoints.
  * keep synced with rates_in_packet_size and rates_out_packet_size in pcm.c
@@ -72,6 +41,10 @@ static const u8 ep_w_max_packet_size[] = {
 	0x94, 0x01, 0x5c, 0x02  /* alt 3: 404 EP2 and 604 EP6 (25 fpp) */
 };
 
+static const u8 known_fw_versions[][4] = {
+	{ 0x03, 0x01, 0x0b, 0x00 }
+};
+
 struct ihex_record {
 	u16 address;
 	u8 len;
@@ -340,7 +313,7 @@ static int usb6fire_fw_fpga_upload(
 
 	while (c != end) {
 		for (i = 0; c != end && i < FPGA_BUFSIZE; i++, c++)
-			buffer[i] = BIT_REVERSE_TABLE[(u8) *c];
+			buffer[i] = byte_rev_table[(u8) *c];
 
 		ret = usb6fire_fw_fpga_write(device, buffer, i);
 		if (ret < 0) {
@@ -363,6 +336,25 @@ static int usb6fire_fw_fpga_upload(
 	return 0;
 }
 
+/* check, if the firmware version the devices has currently loaded
+ * is known by this driver. 'version' needs to have 4 bytes version
+ * info data. */
+static int usb6fire_fw_check(u8 *version)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(known_fw_versions); i++)
+		if (!memcmp(version, known_fw_versions + i, 4))
+			return 0;
+
+	snd_printk(KERN_ERR PREFIX "invalid fimware version in device: "
+			"%02x %02x %02x %02x. "
+			"please reconnect to power. if this failure "
+			"still happens, check your firmware installation.",
+			version[0], version[1], version[2], version[3]);
+	return -EINVAL;
+}
+
 int usb6fire_fw_init(struct usb_interface *intf)
 {
 	int i;
@@ -378,9 +370,7 @@ int usb6fire_fw_init(struct usb_interface *intf)
 				"firmware state.\n");
 		return ret;
 	}
-	if (buffer[0] != 0xeb || buffer[1] != 0xaa || buffer[2] != 0x55
-			|| buffer[4] != 0x03 || buffer[5] != 0x01 || buffer[7]
-			!= 0x00) {
+	if (buffer[0] != 0xeb || buffer[1] != 0xaa || buffer[2] != 0x55) {
 		snd_printk(KERN_ERR PREFIX "unknown device firmware state "
 				"received from device: ");
 		for (i = 0; i < 8; i++)
@@ -389,7 +379,7 @@ int usb6fire_fw_init(struct usb_interface *intf)
 		return -EIO;
 	}
 	/* do we need fpga loader ezusb firmware? */
-	if (buffer[3] == 0x01 && buffer[6] == 0x19) {
+	if (buffer[3] == 0x01) {
 		ret = usb6fire_fw_ezusb_upload(intf,
 				"6fire/dmx6firel2.ihx", 0, NULL, 0);
 		if (ret < 0)
@@ -397,7 +387,10 @@ int usb6fire_fw_init(struct usb_interface *intf)
 		return FW_NOT_READY;
 	}
 	/* do we need fpga firmware and application ezusb firmware? */
-	else if (buffer[3] == 0x02 && buffer[6] == 0x0b) {
+	else if (buffer[3] == 0x02) {
+		ret = usb6fire_fw_check(buffer + 4);
+		if (ret < 0)
+			return ret;
 		ret = usb6fire_fw_fpga_upload(intf, "6fire/dmx6firecf.bin");
 		if (ret < 0)
 			return ret;
@@ -410,8 +403,8 @@ int usb6fire_fw_init(struct usb_interface *intf)
 		return FW_NOT_READY;
 	}
 	/* all fw loaded? */
-	else if (buffer[3] == 0x03 && buffer[6] == 0x0b)
-		return 0;
+	else if (buffer[3] == 0x03)
+		return usb6fire_fw_check(buffer + 4);
 	/* unknown data? */
 	else {
 		snd_printk(KERN_ERR PREFIX "unknown device firmware state "
diff --git a/sound/usb/6fire/pcm.c b/sound/usb/6fire/pcm.c
index ba62c7468ba..b137b25865c 100644
--- a/sound/usb/6fire/pcm.c
+++ b/sound/usb/6fire/pcm.c
@@ -17,26 +17,23 @@
 #include "pcm.h"
 #include "chip.h"
 #include "comm.h"
+#include "control.h"
 
 enum {
 	OUT_N_CHANNELS = 6, IN_N_CHANNELS = 4
 };
 
 /* keep next two synced with
- * FW_EP_W_MAX_PACKET_SIZE[] and RATES_MAX_PACKET_SIZE */
+ * FW_EP_W_MAX_PACKET_SIZE[] and RATES_MAX_PACKET_SIZE
+ * and CONTROL_RATE_XXX in control.h */
 static const int rates_in_packet_size[] = { 228, 228, 420, 420, 404, 404 };
 static const int rates_out_packet_size[] = { 228, 228, 420, 420, 604, 604 };
 static const int rates[] = { 44100, 48000, 88200, 96000, 176400, 192000 };
-static const int rates_altsetting[] = { 1, 1, 2, 2, 3, 3 };
 static const int rates_alsaid[] = {
 	SNDRV_PCM_RATE_44100, SNDRV_PCM_RATE_48000,
 	SNDRV_PCM_RATE_88200, SNDRV_PCM_RATE_96000,
 	SNDRV_PCM_RATE_176400, SNDRV_PCM_RATE_192000 };
 
-/* values to write to soundcard register for all samplerates */
-static const u16 rates_6fire_vl[] = {0x00, 0x01, 0x00, 0x01, 0x00, 0x01};
-static const u16 rates_6fire_vh[] = {0x11, 0x11, 0x10, 0x10, 0x00, 0x00};
-
 enum { /* settings for pcm */
 	OUT_EP = 6, IN_EP = 2, MAX_BUFSIZE = 128 * 1024
 };
@@ -48,15 +45,6 @@ enum { /* pcm streaming states */
 	STREAM_STOPPING
 };
 
-enum { /* pcm sample rates (also index into RATES_XXX[]) */
-	RATE_44KHZ,
-	RATE_48KHZ,
-	RATE_88KHZ,
-	RATE_96KHZ,
-	RATE_176KHZ,
-	RATE_192KHZ
-};
-
 static const struct snd_pcm_hardware pcm_hw = {
 	.info = SNDRV_PCM_INFO_MMAP |
 		SNDRV_PCM_INFO_INTERLEAVED |
@@ -64,7 +52,7 @@ static const struct snd_pcm_hardware pcm_hw = {
 		SNDRV_PCM_INFO_MMAP_VALID |
 		SNDRV_PCM_INFO_BATCH,
 
-	.formats = SNDRV_PCM_FMTBIT_S24_LE,
+	.formats = SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE,
 
 	.rates = SNDRV_PCM_RATE_44100 |
 		SNDRV_PCM_RATE_48000 |
@@ -87,57 +75,34 @@ static const struct snd_pcm_hardware pcm_hw = {
 static int usb6fire_pcm_set_rate(struct pcm_runtime *rt)
 {
 	int ret;
-	struct usb_device *device = rt->chip->dev;
-	struct comm_runtime *comm_rt = rt->chip->comm;
+	struct control_runtime *ctrl_rt = rt->chip->control;
 
-	if (rt->rate >= ARRAY_SIZE(rates))
-		return -EINVAL;
-	/* disable streaming */
-	ret = comm_rt->write16(comm_rt, 0x02, 0x00, 0x00, 0x00);
+	ctrl_rt->usb_streaming = false;
+	ret = ctrl_rt->update_streaming(ctrl_rt);
 	if (ret < 0) {
 		snd_printk(KERN_ERR PREFIX "error stopping streaming while "
 				"setting samplerate %d.\n", rates[rt->rate]);
 		return ret;
 	}
 
-	ret = usb_set_interface(device, 1, rates_altsetting[rt->rate]);
-	if (ret < 0) {
-		snd_printk(KERN_ERR PREFIX "error setting interface "
-				"altsetting %d for samplerate %d.\n",
-				rates_altsetting[rt->rate], rates[rt->rate]);
-		return ret;
-	}
-
-	/* set soundcard clock */
-	ret = comm_rt->write16(comm_rt, 0x02, 0x01, rates_6fire_vl[rt->rate],
-			rates_6fire_vh[rt->rate]);
+	ret = ctrl_rt->set_rate(ctrl_rt, rt->rate);
 	if (ret < 0) {
 		snd_printk(KERN_ERR PREFIX "error setting samplerate %d.\n",
 				rates[rt->rate]);
 		return ret;
 	}
 
-	/* enable analog inputs and outputs
-	 * (one bit per stereo-channel) */
-	ret = comm_rt->write16(comm_rt, 0x02, 0x02,
-			(1 << (OUT_N_CHANNELS / 2)) - 1,
-			(1 << (IN_N_CHANNELS / 2)) - 1);
+	ret = ctrl_rt->set_channels(ctrl_rt, OUT_N_CHANNELS, IN_N_CHANNELS,
+			false, false);
 	if (ret < 0) {
-		snd_printk(KERN_ERR PREFIX "error initializing analog channels "
+		snd_printk(KERN_ERR PREFIX "error initializing channels "
 				"while setting samplerate %d.\n",
 				rates[rt->rate]);
 		return ret;
 	}
-	/* disable digital inputs and outputs */
-	ret = comm_rt->write16(comm_rt, 0x02, 0x03, 0x00, 0x00);
-	if (ret < 0) {
-		snd_printk(KERN_ERR PREFIX "error initializing digital "
-				"channels while setting samplerate %d.\n",
-				rates[rt->rate]);
-		return ret;
-	}
 
-	ret = comm_rt->write16(comm_rt, 0x02, 0x00, 0x00, 0x01);
+	ctrl_rt->usb_streaming = true;
+	ret = ctrl_rt->update_streaming(ctrl_rt);
 	if (ret < 0) {
 		snd_printk(KERN_ERR PREFIX "error starting streaming while "
 				"setting samplerate %d.\n", rates[rt->rate]);
@@ -168,12 +133,15 @@ static struct pcm_substream *usb6fire_pcm_get_substream(
 static void usb6fire_pcm_stream_stop(struct pcm_runtime *rt)
 {
 	int i;
+	struct control_runtime *ctrl_rt = rt->chip->control;
 
 	if (rt->stream_state != STREAM_DISABLED) {
 		for (i = 0; i < PCM_N_URBS; i++) {
 			usb_kill_urb(&rt->in_urbs[i].instance);
 			usb_kill_urb(&rt->out_urbs[i].instance);
 		}
+		ctrl_rt->usb_streaming = false;
+		ctrl_rt->update_streaming(ctrl_rt);
 		rt->stream_state = STREAM_DISABLED;
 	}
 }
@@ -228,7 +196,7 @@ static void usb6fire_pcm_capture(struct pcm_substream *sub, struct pcm_urb *urb)
 	unsigned int total_length = 0;
 	struct pcm_runtime *rt = snd_pcm_substream_chip(sub->instance);
 	struct snd_pcm_runtime *alsa_rt = sub->instance->runtime;
-	u32 *src = (u32 *) urb->buffer;
+	u32 *src = NULL;
 	u32 *dest = (u32 *) (alsa_rt->dma_area + sub->dma_off
 			* (alsa_rt->frame_bits >> 3));
 	u32 *dest_end = (u32 *) (alsa_rt->dma_area + alsa_rt->buffer_size
@@ -244,7 +212,12 @@ static void usb6fire_pcm_capture(struct pcm_substream *sub, struct pcm_urb *urb)
 		else
 			frame_count = 0;
 
-		src = (u32 *) (urb->buffer + total_length);
+		if (alsa_rt->format == SNDRV_PCM_FORMAT_S24_LE)
+			src = (u32 *) (urb->buffer + total_length);
+		else if (alsa_rt->format == SNDRV_PCM_FORMAT_S32_LE)
+			src = (u32 *) (urb->buffer - 1 + total_length);
+		else
+			return;
 		src++; /* skip leading 4 bytes of every packet */
 		total_length += urb->packets[i].length;
 		for (frame = 0; frame < frame_count; frame++) {
@@ -274,9 +247,18 @@ static void usb6fire_pcm_playback(struct pcm_substream *sub,
 			* (alsa_rt->frame_bits >> 3));
 	u32 *src_end = (u32 *) (alsa_rt->dma_area + alsa_rt->buffer_size
 			* (alsa_rt->frame_bits >> 3));
-	u32 *dest = (u32 *) urb->buffer;
+	u32 *dest;
 	int bytes_per_frame = alsa_rt->channels << 2;
 
+	if (alsa_rt->format == SNDRV_PCM_FORMAT_S32_LE)
+		dest = (u32 *) (urb->buffer - 1);
+	else if (alsa_rt->format == SNDRV_PCM_FORMAT_S24_LE)
+		dest = (u32 *) (urb->buffer);
+	else {
+		snd_printk(KERN_ERR PREFIX "Unknown sample format.");
+		return;
+	}
+
 	for (i = 0; i < PCM_N_PACKETS_PER_URB; i++) {
 		/* at least 4 header bytes for valid packet.
 		 * after that: 32 bits per sample for analog channels */
@@ -456,7 +438,7 @@ static int usb6fire_pcm_close(struct snd_pcm_substream *alsa_sub)
 		/* all substreams closed? if so, stop streaming */
 		if (!rt->playback.instance && !rt->capture.instance) {
 			usb6fire_pcm_stream_stop(rt);
-			rt->rate = -1;
+			rt->rate = ARRAY_SIZE(rates);
 		}
 	}
 	mutex_unlock(&rt->stream_mutex);
@@ -480,7 +462,6 @@ static int usb6fire_pcm_prepare(struct snd_pcm_substream *alsa_sub)
 	struct pcm_runtime *rt = snd_pcm_substream_chip(alsa_sub);
 	struct pcm_substream *sub = usb6fire_pcm_get_substream(alsa_sub);
 	struct snd_pcm_runtime *alsa_rt = alsa_sub->runtime;
-	int i;
 	int ret;
 
 	if (rt->panic)
@@ -493,12 +474,10 @@ static int usb6fire_pcm_prepare(struct snd_pcm_substream *alsa_sub)
 	sub->period_off = 0;
 
 	if (rt->stream_state == STREAM_DISABLED) {
-		for (i = 0; i < ARRAY_SIZE(rates); i++)
-			if (alsa_rt->rate == rates[i]) {
-				rt->rate = i;
+		for (rt->rate = 0; rt->rate < ARRAY_SIZE(rates); rt->rate++)
+			if (alsa_rt->rate == rates[rt->rate])
 				break;
-			}
-		if (i == ARRAY_SIZE(rates)) {
+		if (rt->rate == ARRAY_SIZE(rates)) {
 			mutex_unlock(&rt->stream_mutex);
 			snd_printk("invalid rate %d in prepare.\n",
 					alsa_rt->rate);
@@ -613,7 +592,7 @@ int __devinit usb6fire_pcm_init(struct sfire_chip *chip)
 
 	rt->chip = chip;
 	rt->stream_state = STREAM_DISABLED;
-	rt->rate = -1;
+	rt->rate = ARRAY_SIZE(rates);
 	init_waitqueue_head(&rt->stream_wait_queue);
 	mutex_init(&rt->stream_mutex);
 
diff --git a/sound/usb/Kconfig b/sound/usb/Kconfig
index 97724d8fa9f..8beb77563da 100644
--- a/sound/usb/Kconfig
+++ b/sound/usb/Kconfig
@@ -100,19 +100,17 @@ config SND_USB_US122L
 
 config SND_USB_6FIRE
         tristate "TerraTec DMX 6Fire USB"
-        depends on EXPERIMENTAL
         select FW_LOADER
+        select BITREVERSE
         select SND_RAWMIDI
         select SND_PCM
         help
           Say Y here to include support for TerraTec 6fire DMX USB interface.
 
           You will need firmware files in order to be able to use the device
-          after it has been coldstarted. This driver currently does not support
-          firmware loading for all devices. If you own such a device,
-          you could start windows and let the windows driver upload
-          the firmware. As long as you do not unplug your device from power,
-          it should be usable.
+          after it has been coldstarted. An install script for the firmware
+          and further help can be found at
+          http://sixfireusb.sourceforge.net
 
 endif	# SND_USB
 
diff --git a/sound/usb/card.c b/sound/usb/card.c
index a90662af2d6..220c6167dd8 100644
--- a/sound/usb/card.c
+++ b/sound/usb/card.c
@@ -48,6 +48,7 @@
 #include <linux/usb/audio.h>
 #include <linux/usb/audio-v2.h>
 
+#include <sound/control.h>
 #include <sound/core.h>
 #include <sound/info.h>
 #include <sound/pcm.h>
@@ -492,14 +493,6 @@ static void *snd_usb_audio_probe(struct usb_device *dev,
 		}
 	}
 
-	chip->txfr_quirk = 0;
-	err = 1; /* continue */
-	if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
-		/* need some special handlings */
-		if ((err = snd_usb_create_quirk(chip, intf, &usb_audio_driver, quirk)) < 0)
-			goto __error;
-	}
-
 	/*
 	 * For devices with more than one control interface, we assume the
 	 * first contains the audio controls. We might need a more specific
@@ -508,6 +501,14 @@ static void *snd_usb_audio_probe(struct usb_device *dev,
 	if (!chip->ctrl_intf)
 		chip->ctrl_intf = alts;
 
+	chip->txfr_quirk = 0;
+	err = 1; /* continue */
+	if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
+		/* need some special handlings */
+		if ((err = snd_usb_create_quirk(chip, intf, &usb_audio_driver, quirk)) < 0)
+			goto __error;
+	}
+
 	if (err > 0) {
 		/* create normal USB audio interfaces */
 		if (snd_usb_create_streams(chip, ifnum) < 0 ||
diff --git a/sound/usb/clock.c b/sound/usb/clock.c
index 7754a103454..075195e8661 100644
--- a/sound/usb/clock.c
+++ b/sound/usb/clock.c
@@ -104,6 +104,15 @@ static bool uac_clock_source_is_valid(struct snd_usb_audio *chip, int source_id)
 	int err;
 	unsigned char data;
 	struct usb_device *dev = chip->dev;
+	struct uac_clock_source_descriptor *cs_desc =
+		snd_usb_find_clock_source(chip->ctrl_intf, source_id);
+
+	if (!cs_desc)
+		return 0;
+
+	/* If a clock source can't tell us whether it's valid, we assume it is */
+	if (!uac2_control_is_readable(cs_desc->bmControls, UAC2_CS_CONTROL_CLOCK_VALID))
+		return 1;
 
 	err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_CUR,
 			      USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
@@ -114,7 +123,7 @@ static bool uac_clock_source_is_valid(struct snd_usb_audio *chip, int source_id)
 	if (err < 0) {
 		snd_printk(KERN_WARNING "%s(): cannot get clock validity for id %d\n",
 			   __func__, source_id);
-		return err;
+		return 0;
 	}
 
 	return !!data;
diff --git a/sound/usb/debug.h b/sound/usb/debug.h
index 343ec2d9ee6..58030176f00 100644
--- a/sound/usb/debug.h
+++ b/sound/usb/debug.h
@@ -8,7 +8,7 @@
 #ifdef HW_CONST_DEBUG
 #define hwc_debug(fmt, args...) printk(KERN_DEBUG fmt, ##args)
 #else
-#define hwc_debug(fmt, args...) /**/
+#define hwc_debug(fmt, args...) do { } while(0)
 #endif
 
 #endif /* __USBAUDIO_DEBUG_H */
diff --git a/sound/usb/format.c b/sound/usb/format.c
index f079b5e2ab2..8d042dce0d1 100644
--- a/sound/usb/format.c
+++ b/sound/usb/format.c
@@ -30,6 +30,7 @@
 #include "helper.h"
 #include "debug.h"
 #include "clock.h"
+#include "format.h"
 
 /*
  * parse the audio format type I descriptor
diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index 6ec33b62e6c..c22fa76e363 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -86,16 +86,6 @@ struct mixer_build {
 	const struct usbmix_selector_map *selector_map;
 };
 
-enum {
-	USB_MIXER_BOOLEAN,
-	USB_MIXER_INV_BOOLEAN,
-	USB_MIXER_S8,
-	USB_MIXER_U8,
-	USB_MIXER_S16,
-	USB_MIXER_U16,
-};
-
-
 /*E-mu 0202/0404/0204 eXtension Unit(XU) control*/
 enum {
 	USB_XU_CLOCK_RATE 		= 0xe301,
@@ -535,20 +525,21 @@ static int check_matrix_bitmap(unsigned char *bmap, int ich, int och, int num_ou
  * if failed, give up and free the control instance.
  */
 
-static int add_control_to_empty(struct mixer_build *state, struct snd_kcontrol *kctl)
+int snd_usb_mixer_add_control(struct usb_mixer_interface *mixer,
+			      struct snd_kcontrol *kctl)
 {
 	struct usb_mixer_elem_info *cval = kctl->private_data;
 	int err;
 
-	while (snd_ctl_find_id(state->chip->card, &kctl->id))
+	while (snd_ctl_find_id(mixer->chip->card, &kctl->id))
 		kctl->id.index++;
-	if ((err = snd_ctl_add(state->chip->card, kctl)) < 0) {
+	if ((err = snd_ctl_add(mixer->chip->card, kctl)) < 0) {
 		snd_printd(KERN_ERR "cannot add control (err = %d)\n", err);
 		return err;
 	}
 	cval->elem_id = &kctl->id;
-	cval->next_id_elem = state->mixer->id_elems[cval->id];
-	state->mixer->id_elems[cval->id] = cval;
+	cval->next_id_elem = mixer->id_elems[cval->id];
+	mixer->id_elems[cval->id] = cval;
 	return 0;
 }
 
@@ -984,6 +975,9 @@ static struct snd_kcontrol_new usb_feature_unit_ctl_ro = {
 	.put = NULL,
 };
 
+/* This symbol is exported in order to allow the mixer quirks to
+ * hook up to the standard feature unit control mechanism */
+struct snd_kcontrol_new *snd_usb_feature_unit_ctl = &usb_feature_unit_ctl;
 
 /*
  * build a feature control
@@ -1097,11 +1091,13 @@ static void build_feature_ctl(struct mixer_build *state, void *raw_desc,
 		append_ctl_name(kctl, control == UAC_FU_MUTE ?
 				" Switch" : " Volume");
 		if (control == UAC_FU_VOLUME) {
-			kctl->tlv.c = mixer_vol_tlv;
-			kctl->vd[0].access |= 
-				SNDRV_CTL_ELEM_ACCESS_TLV_READ |
-				SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK;
 			check_mapped_dB(map, cval);
+			if (cval->dBmin < cval->dBmax) {
+				kctl->tlv.c = mixer_vol_tlv;
+				kctl->vd[0].access |= 
+					SNDRV_CTL_ELEM_ACCESS_TLV_READ |
+					SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK;
+			}
 		}
 		break;
 
@@ -1174,7 +1170,7 @@ static void build_feature_ctl(struct mixer_build *state, void *raw_desc,
 
 	snd_printdd(KERN_INFO "[%d] FU [%s] ch = %d, val = %d/%d/%d\n",
 		    cval->id, kctl->id.name, cval->channels, cval->min, cval->max, cval->res);
-	add_control_to_empty(state, kctl);
+	snd_usb_mixer_add_control(state->mixer, kctl);
 }
 
 
@@ -1338,7 +1334,7 @@ static void build_mixer_unit_ctl(struct mixer_build *state,
 
 	snd_printdd(KERN_INFO "[%d] MU [%s] ch = %d, val = %d/%d\n",
 		    cval->id, kctl->id.name, cval->channels, cval->min, cval->max);
-	add_control_to_empty(state, kctl);
+	snd_usb_mixer_add_control(state->mixer, kctl);
 }
 
 
@@ -1639,7 +1635,7 @@ static int build_audio_procunit(struct mixer_build *state, int unitid, void *raw
 
 		snd_printdd(KERN_INFO "[%d] PU [%s] ch = %d, val = %d/%d\n",
 			    cval->id, kctl->id.name, cval->channels, cval->min, cval->max);
-		if ((err = add_control_to_empty(state, kctl)) < 0)
+		if ((err = snd_usb_mixer_add_control(state->mixer, kctl)) < 0)
 			return err;
 	}
 	return 0;
@@ -1856,7 +1852,7 @@ static int parse_audio_selector_unit(struct mixer_build *state, int unitid, void
 
 	snd_printdd(KERN_INFO "[%d] SU [%s] items = %d\n",
 		    cval->id, kctl->id.name, desc->bNrInPins);
-	if ((err = add_control_to_empty(state, kctl)) < 0)
+	if ((err = snd_usb_mixer_add_control(state->mixer, kctl)) < 0)
 		return err;
 
 	return 0;
diff --git a/sound/usb/mixer.h b/sound/usb/mixer.h
index b4a2c8165e4..ae1a14dcfe8 100644
--- a/sound/usb/mixer.h
+++ b/sound/usb/mixer.h
@@ -24,7 +24,16 @@ struct usb_mixer_interface {
 	u8 xonar_u1_status;
 };
 
-#define MAX_CHANNELS	10	/* max logical channels */
+#define MAX_CHANNELS	16	/* max logical channels */
+
+enum {
+	USB_MIXER_BOOLEAN,
+	USB_MIXER_INV_BOOLEAN,
+	USB_MIXER_S8,
+	USB_MIXER_U8,
+	USB_MIXER_S16,
+	USB_MIXER_U16,
+};
 
 struct usb_mixer_elem_info {
 	struct usb_mixer_interface *mixer;
@@ -55,4 +64,7 @@ int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
 void snd_usb_mixer_inactivate(struct usb_mixer_interface *mixer);
 int snd_usb_mixer_activate(struct usb_mixer_interface *mixer);
 
+int snd_usb_mixer_add_control(struct usb_mixer_interface *mixer,
+			      struct snd_kcontrol *kctl);
+
 #endif /* __USBMIXER_H */
diff --git a/sound/usb/mixer_quirks.c b/sound/usb/mixer_quirks.c
index 73dcc8256bc..3d0f4873112 100644
--- a/sound/usb/mixer_quirks.c
+++ b/sound/usb/mixer_quirks.c
@@ -40,6 +40,8 @@
 #include "mixer_quirks.h"
 #include "helper.h"
 
+extern struct snd_kcontrol_new *snd_usb_feature_unit_ctl;
+
 /*
  * Sound Blaster remote control configuration
  *
@@ -61,6 +63,7 @@ static const struct rc_config {
 	{ USB_ID(0x041e, 0x3020), 2, 1, 6, 6,  18, 0x0013 }, /* Audigy 2 NX  */
 	{ USB_ID(0x041e, 0x3040), 2, 2, 6, 6,  2,  0x6e91 }, /* Live! 24-bit */
 	{ USB_ID(0x041e, 0x3042), 0, 1, 1, 1,  1,  0x000d }, /* Usb X-Fi S51 */
+	{ USB_ID(0x041e, 0x30df), 0, 1, 1, 1,  1,  0x000d }, /* Usb X-Fi S51 Pro */
 	{ USB_ID(0x041e, 0x3048), 2, 2, 6, 6,  2,  0x6e91 }, /* Toshiba SB0500 */
 };
 
@@ -188,6 +191,12 @@ static int snd_audigy2nx_led_put(struct snd_kcontrol *kcontrol, struct snd_ctl_e
 			      usb_sndctrlpipe(mixer->chip->dev, 0), 0x24,
 			      USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
 			      !value, 0, NULL, 0, 100);
+	/* USB X-Fi S51 Pro */
+	if (mixer->chip->usb_id == USB_ID(0x041e, 0x30df))
+		err = snd_usb_ctl_msg(mixer->chip->dev,
+			      usb_sndctrlpipe(mixer->chip->dev, 0), 0x24,
+			      USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
+			      !value, 0, NULL, 0, 100);
 	else
 		err = snd_usb_ctl_msg(mixer->chip->dev,
 			      usb_sndctrlpipe(mixer->chip->dev, 0), 0x24,
@@ -234,9 +243,13 @@ static int snd_audigy2nx_controls_create(struct usb_mixer_interface *mixer)
 		/* USB X-Fi S51 doesn't have a CMSS LED */
 		if ((mixer->chip->usb_id == USB_ID(0x041e, 0x3042)) && i == 0)
 			continue;
+		/* USB X-Fi S51 Pro doesn't have one either */
+		if ((mixer->chip->usb_id == USB_ID(0x041e, 0x30df)) && i == 0)
+			continue;
 		if (i > 1 && /* Live24ext has 2 LEDs only */
 			(mixer->chip->usb_id == USB_ID(0x041e, 0x3040) ||
 			 mixer->chip->usb_id == USB_ID(0x041e, 0x3042) ||
+			 mixer->chip->usb_id == USB_ID(0x041e, 0x30df) ||
 			 mixer->chip->usb_id == USB_ID(0x041e, 0x3048)))
 			break; 
 		err = snd_ctl_add(mixer->chip->card,
@@ -481,6 +494,69 @@ static int snd_nativeinstruments_create_mixer(struct usb_mixer_interface *mixer,
 	return err;
 }
 
+/* M-Audio FastTrack Ultra quirks */
+
+/* private_free callback */
+static void usb_mixer_elem_free(struct snd_kcontrol *kctl)
+{
+	kfree(kctl->private_data);
+	kctl->private_data = NULL;
+}
+
+static int snd_maudio_ftu_create_ctl(struct usb_mixer_interface *mixer,
+				     int in, int out, const char *name)
+{
+	struct usb_mixer_elem_info *cval;
+	struct snd_kcontrol *kctl;
+
+	cval = kzalloc(sizeof(*cval), GFP_KERNEL);
+	if (!cval)
+		return -ENOMEM;
+
+	cval->id = 5;
+	cval->mixer = mixer;
+	cval->val_type = USB_MIXER_S16;
+	cval->channels = 1;
+	cval->control = out + 1;
+	cval->cmask = 1 << in;
+
+	kctl = snd_ctl_new1(snd_usb_feature_unit_ctl, cval);
+	if (!kctl) {
+		kfree(cval);
+		return -ENOMEM;
+	}
+
+	snprintf(kctl->id.name, sizeof(kctl->id.name), name);
+	kctl->private_free = usb_mixer_elem_free;
+	return snd_usb_mixer_add_control(mixer, kctl);
+}
+
+static int snd_maudio_ftu_create_mixer(struct usb_mixer_interface *mixer)
+{
+	char name[64];
+	int in, out, err;
+
+	for (out = 0; out < 8; out++) {
+		for (in = 0; in < 8; in++) {
+			snprintf(name, sizeof(name),
+				 "AIn%d - Out%d Capture Volume", in  + 1, out + 1);
+			err = snd_maudio_ftu_create_ctl(mixer, in, out, name);
+			if (err < 0)
+				return err;
+		}
+
+		for (in = 8; in < 16; in++) {
+			snprintf(name, sizeof(name),
+				 "DIn%d - Out%d Playback Volume", in - 7, out + 1);
+			err = snd_maudio_ftu_create_ctl(mixer, in, out, name);
+			if (err < 0)
+				return err;
+		}
+	}
+
+	return 0;
+}
+
 void snd_emuusb_set_samplerate(struct snd_usb_audio *chip,
 			       unsigned char samplerate_id)
 {
@@ -512,6 +588,7 @@ int snd_usb_mixer_apply_create_quirk(struct usb_mixer_interface *mixer)
 	case USB_ID(0x041e, 0x3020):
 	case USB_ID(0x041e, 0x3040):
 	case USB_ID(0x041e, 0x3042):
+	case USB_ID(0x041e, 0x30df):
 	case USB_ID(0x041e, 0x3048):
 		err = snd_audigy2nx_controls_create(mixer);
 		if (err < 0)
@@ -521,6 +598,11 @@ int snd_usb_mixer_apply_create_quirk(struct usb_mixer_interface *mixer)
 					      snd_audigy2nx_proc_read);
 		break;
 
+	case USB_ID(0x0763, 0x2080): /* M-Audio Fast Track Ultra */
+	case USB_ID(0x0763, 0x2081): /* M-Audio Fast Track Ultra 8R */
+		err = snd_maudio_ftu_create_mixer(mixer);
+		break;
+
 	case USB_ID(0x0b05, 0x1739):
 	case USB_ID(0x0b05, 0x1743):
 		err = snd_xonar_u1_controls_create(mixer);
diff --git a/sound/usb/quirks-table.h b/sound/usb/quirks-table.h
index c66d3f64dcf..0b2ae8e1c02 100644
--- a/sound/usb/quirks-table.h
+++ b/sound/usb/quirks-table.h
@@ -1651,6 +1651,32 @@ YAMAHA_DEVICE(0x7010, "UB99"),
 		}
 	}
 },
+{
+	USB_DEVICE(0x0582, 0x0127),
+	.driver_info = (unsigned long) & (const struct snd_usb_audio_quirk) {
+		/* .vendor_name = "Roland", */
+		/* .product_name = "GR-55", */
+		.ifnum = QUIRK_ANY_INTERFACE,
+		.type = QUIRK_COMPOSITE,
+		.data = (const struct snd_usb_audio_quirk[]) {
+			{
+				.ifnum = 0,
+				.type = QUIRK_AUDIO_STANDARD_INTERFACE
+			},
+			{
+				.ifnum = 1,
+				.type = QUIRK_AUDIO_STANDARD_INTERFACE
+			},
+			{
+				.ifnum = 2,
+				.type = QUIRK_MIDI_STANDARD_INTERFACE
+			},
+			{
+				.ifnum = -1
+			}
+		}
+	}
+},
 
 /* Guillemot devices */
 {
@@ -1953,7 +1979,7 @@ YAMAHA_DEVICE(0x7010, "UB99"),
 	}
 },
 {
-	USB_DEVICE(0x0763, 0x2080),
+	USB_DEVICE_VENDOR_SPEC(0x0763, 0x2080),
 	.driver_info = (unsigned long) & (const struct snd_usb_audio_quirk) {
 		/* .vendor_name = "M-Audio", */
 		/* .product_name = "Fast Track Ultra", */
@@ -1962,7 +1988,7 @@ YAMAHA_DEVICE(0x7010, "UB99"),
 		.data = & (const struct snd_usb_audio_quirk[]) {
 			{
 				.ifnum = 0,
-				.type = QUIRK_IGNORE_INTERFACE
+				.type = QUIRK_AUDIO_STANDARD_MIXER,
 			},
 			{
 				.ifnum = 1,
@@ -2020,7 +2046,7 @@ YAMAHA_DEVICE(0x7010, "UB99"),
 	}
 },
 {
-	USB_DEVICE(0x0763, 0x2081),
+	USB_DEVICE_VENDOR_SPEC(0x0763, 0x2081),
 	.driver_info = (unsigned long) & (const struct snd_usb_audio_quirk) {
 		/* .vendor_name = "M-Audio", */
 		/* .product_name = "Fast Track Ultra 8R", */
@@ -2029,7 +2055,7 @@ YAMAHA_DEVICE(0x7010, "UB99"),
 		.data = & (const struct snd_usb_audio_quirk[]) {
 			{
 				.ifnum = 0,
-				.type = QUIRK_IGNORE_INTERFACE
+				.type = QUIRK_AUDIO_STANDARD_MIXER,
 			},
 			{
 				.ifnum = 1,
@@ -2179,6 +2205,17 @@ YAMAHA_DEVICE(0x7010, "UB99"),
 	}
 },
 
+/* KORG devices */
+{
+	USB_DEVICE_VENDOR_SPEC(0x0944, 0x0200),
+	.driver_info = (unsigned long) & (const struct snd_usb_audio_quirk) {
+		.vendor_name = "KORG, Inc.",
+		/* .product_name = "PANDORA PX5D", */
+		.ifnum = 3,
+		.type = QUIRK_MIDI_STANDARD_INTERFACE,
+	}
+},
+
 /* AKAI devices */
 {
 	USB_DEVICE(0x09e8, 0x0062),
@@ -2332,6 +2369,12 @@ YAMAHA_DEVICE(0x7010, "UB99"),
 
 /* Native Instruments MK2 series */
 {
+	/* Komplete Audio 6 */
+	.match_flags = USB_DEVICE_ID_MATCH_DEVICE,
+	.idVendor = 0x17cc,
+	.idProduct = 0x1000,
+},
+{
 	/* Traktor Audio 6 */
 	.match_flags = USB_DEVICE_ID_MATCH_DEVICE,
 	.idVendor = 0x17cc,
diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index 1b94ec3a336..2e969cbb393 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -19,6 +19,7 @@
 #include <linux/usb.h>
 #include <linux/usb/audio.h>
 
+#include <sound/control.h>
 #include <sound/core.h>
 #include <sound/info.h>
 #include <sound/pcm.h>
@@ -263,6 +264,20 @@ static int create_uaxx_quirk(struct snd_usb_audio *chip,
 }
 
 /*
+ * Create a standard mixer for the specified interface.
+ */
+static int create_standard_mixer_quirk(struct snd_usb_audio *chip,
+				       struct usb_interface *iface,
+				       struct usb_driver *driver,
+				       const struct snd_usb_audio_quirk *quirk)
+{
+	if (quirk->ifnum < 0)
+		return 0;
+
+	return snd_usb_create_mixer(chip, quirk->ifnum, 0);
+}
+
+/*
  * audio-interface quirks
  *
  * returns zero if no standard audio/MIDI parsing is needed.
@@ -294,7 +309,8 @@ int snd_usb_create_quirk(struct snd_usb_audio *chip,
 		[QUIRK_AUDIO_STANDARD_INTERFACE] = create_standard_audio_quirk,
 		[QUIRK_AUDIO_FIXED_ENDPOINT] = create_fixed_stream_quirk,
 		[QUIRK_AUDIO_EDIROL_UAXX] = create_uaxx_quirk,
-		[QUIRK_AUDIO_ALIGN_TRANSFER] = create_align_transfer_quirk
+		[QUIRK_AUDIO_ALIGN_TRANSFER] = create_align_transfer_quirk,
+		[QUIRK_AUDIO_STANDARD_MIXER] = create_standard_mixer_quirk,
 	};
 
 	if (quirk->type < QUIRK_TYPE_COUNT) {
@@ -540,6 +556,7 @@ int snd_usb_apply_boot_quirk(struct usb_device *dev,
 		/* Access Music VirusTI Desktop */
 		return snd_usb_accessmusic_boot_quirk(dev);
 
+	case USB_ID(0x17cc, 0x1000): /* Komplete Audio 6 */
 	case USB_ID(0x17cc, 0x1010): /* Traktor Audio 6 */
 	case USB_ID(0x17cc, 0x1020): /* Traktor Audio 10 */
 		return snd_usb_nativeinstruments_boot_quirk(dev);
diff --git a/sound/usb/usbaudio.h b/sound/usb/usbaudio.h
index 32f2a97f2f1..1e79986b577 100644
--- a/sound/usb/usbaudio.h
+++ b/sound/usb/usbaudio.h
@@ -84,6 +84,7 @@ enum quirk_type {
 	QUIRK_AUDIO_FIXED_ENDPOINT,
 	QUIRK_AUDIO_EDIROL_UAXX,
 	QUIRK_AUDIO_ALIGN_TRANSFER,
+	QUIRK_AUDIO_STANDARD_MIXER,
 
 	QUIRK_TYPE_COUNT
 };